V. R. da Silva e I. T. S. Previdelli, “<b>Item response theory in the production of indicators of socioeconomic metropolitan region of Maringá, Paraná State, Brazil</b> - doi: 10.4025/actascitechnol.v34i4.10478”, Acta Sci. Technol., vol. 34, nº 4, p. 427–431, maio 2012.